Selective sorption of Ce3+ over La3+ ions on biogenic manganese oxides

Keiko Sasaki, T. Kaseyama, Tsuyoshi Hirajima

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

5 被引用数 (Scopus)

抄録

Unique properties of biogenic Mn oxides were applied to a fundamental study of separation and recovery of rare earth elements. Selective sorption of Ce3+ over La3+ ions was achieved at neutral pH values using biogenic Mn oxides produced by Paraconiothyrium sp. WL-2 strain. The selective coefficient for Ce3+ (αCe) was much greater with biogenic and synthetic Mn oxides than those for La3+La). Ce3+ ions were oxidized to CeO2 by Mn(III, IV) in Mn oxides under anaerobic conditions resulting in the release of Mn2+ ions, while La3+ ions were sorbed without a redox reaction. With an increase in coexisting La3+ ions, sorption of Ce3+ on both Mn oxides was significantly suppressed, especially with synthetic Mn oxides. The edges of the structure are competitive sites because of fewer numbers of vacant sites in synthetic Mn oxide layers. The preferential sorption on the edge sites of Mn oxides is in the order of La3+ > Ce3+. These phenomena can be expanded to separation and recovery of other rare earth elements from natural and anthropogenic sources.

本文言語英語
ホスト出版物のタイトルBiohydrometallurgy 2009
ホスト出版物のサブタイトルA Meeting Point between Microbial Ecology, Metal Recovery Processes and Environmental Remediation - Selected, peer rev. papers 18th Int. Biohydrometallurgy Symp., IBS 2009
ページ633-636
ページ数4
DOI
出版ステータス出版済み - 12 28 2009
イベント18th International Biohydrometallurgy Symposium, IBS 2009 - Bariloche, アルゼンチン
継続期間: 9 13 20099 17 2009

出版物シリーズ

名前Advanced Materials Research
71-73
ISSN(印刷版)1022-6680

その他

その他18th International Biohydrometallurgy Symposium, IBS 2009
国/地域アルゼンチン
CityBariloche
Period9/13/099/17/09

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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